My regexp skills are somewhere infinitesimally close to zero. I have never really 'gotten' them. That said, I have spent a couple hours already search for help to write a rewriterule that works on a string in the URL. In particular I want success if either of the following were provided: webmail.domain (e.g. webmail.foo.com) server/webmail (e.g. www.foo.com/webmail) And I have not found anything like this, nor do I know even close enough of regexp to recognize something like this in another expression. Thanks for the help.